In his book “Wired for Intimacy,” William M. Struthers writes:

When I was young, I visited a farm that had an old-fashioned water pump. It was centered on a cement slab and would drip long after you stopped pumping. Over the years the dripping water had cut a trough to the edge of the slab. The trough was nearly two inches deep.

So it is with pornography in a man's brain. Because of the way the male brain is wired, it is prone to pick up on sexually relevant cues. These cues trigger arousal and a series of neurological, hormonal, and neurochemical events are set into motion. Memories about how to respond to these cues are set off. As the pattern of arousal and response continues, it deepens the neurological pathway, making it a trough. Each time an unhealthy sexual pattern is repeated, neurological, emotional, and spiritual erosion carves out a channel that will eventually develop into a canyon from which there is no escape.

But if this corrupted pathway can be avoided, a new pathway can be formed. We can establish a healthy sexual pattern where the flow is redirected toward holiness …. That is part of the process of sanctification.